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Finding the Fourth Proportional to 12,239.52, 18,348.90 and 4,849.20

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Solution

The fourth proportional to 12,239.52, 18,348.90 and 4,849.20 is: 7,269.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,239.52 : 18,348.90 = 4,849.20 : x
  2. Step 2: Convert to fraction form
    12,239.52/18,348.90 = 4,849.20/x
  3. Step 3: Cross multiply
    12,239.52x = 18,348.90 × 4,849.20
  4. Step 4: Simplify right side
    12,239.52x = 88,977,485.88
  5. Step 5: Solve for x
    x = 88,977,485.88/12,239.52
  6. Step 6: Final answer
    x = 7,269.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.